Air diffuser



FIG. 1 is a perspective view of an air diffuser, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings depict portions of the air diffuser that form no part of the claimed design.

The dash-dot broken lines in the figure drawings define the bounds of the claimed design and form no part thereof. 

CLAIM The ornamental design for an air diffuser, as shown and described. 